cardiolipin

(redirected from heart antigen)
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car·di·o·lip·in

 (kär′dē-ō-lĭp′ĭn)
n.
A phospholipid usually obtained from beef heart, used in combination with phosphatidylcholine and cholesterol as an antigen to diagnose syphilis.

[cardio- + lipin, lipid (Greek lipos, fat; see lipo- + -in).]